Combination-auger.



No. 843,832. PATENTED FEB.12, 1907.

M. LINGOL. l GOMBINATIUN AUGER. APPLIQATION FILED P EB. 24, 1906.

narran sfrarrns .PATENT OFFOE.

COMBINATION-AUGER.

Specification of Letters Patent.

Patented Feb. 12, 1907.

Application filed February 24,1906. Serial No. 302,803.

To @ZZ whom. it may concern:

Be it known that l, MATT LiNGoL, a citizen of the United States, residing at Telluride, in the county of San Miguel and State of Colorado, have invented certain new and useful Improvements in Combination-Angers, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to combination-aui gers, and particularly to that class of implements adapted for use in cutting bolt-holes and similar openings through beams, rafters, girders, and the like, where it is usually necessary or desirable to bore holes of considerable depth for the insertion of bolts, whereby pieces of wood may be held together or retained in position, the primary object of this invention being to provide means 'for couni tersmking to iorm an opening or recess 1n which the nut may rest so as to be Vflush with the wood.

A still further object ot the invention is to provide an auger having a countersinking device adjustably mounted thereon and so arranged to countersink a recess for the nut at the same time the hole is bored for the bolt.

Heretotore in sinking washers or nuts it has been the practice to chisel out an opening with a mallet and chisel in order that said` nut or washer might rest 'flush with the wood, and by the use of my invention the mallet and chisel may be dispensed with, as the opening for the washer or nut will be made simultaneous with the boring of the aperture for the bolt, making the invention or' great advantage in bridge, lume, and other construction work where heavy timbers are bolted together at various angles.

My invention consists in the arrangement and construction of parts hereinafter more i fully described and claimed, and illustrated in the accompanying drawings, which are made a p art of the speciiic ation.

In the drawings like reference-numerals designate corresponding portions throughout, and Figure l is a perspective view of the complete device without the ordinary auger or bit handle. Fig. 2 is a side elevation, partly in section, illustrating the manner in which the countersinking is ei'lected simultaneously with the boring of the bolt-hole, and Fig. 8 is a detail perspective view showing parts removed.

l designates a shank squared at the top,

j as shown at 2, to receive a handle. The lower end oi this shank is threaded, as at 3, l to receive a cutting-disk fl, having a central j threaded opening 4 therethrough and an irregular-shaped slot 5, the wall of which is inclined, as shown at 5, to form a cutting edge. ln order that this cutting edge may engage the material to be cut, the projecting point 6 is slightly bent downward, which j enables the sharp edge 6 to shave the matel rial operated upon and perform the act oi j boring out a recess for the nut or washer. l

Fitting on the lower end of said shank l is an interiorl T-threaded sleeve 7, having an opening S for the reception of a set-screw 9,

by means ol which an auger or bit 10 may be secured in the lower end of said sleeve. j The upper end oi this sleeve is arranged to I engage the cutting-disk 4 and bear against j it to nictionally hold the same against rotation on the threads, said sleeve affording means whereby the disk may be held against rotation in adjusted positions on the threaded portion 3 oi said shank.

ln operation the cutting-disk el is adjusted on the threaded portion 3 of the shank l, so that it will contact the timber or wood to j countersink a recess for the nut or washer as the hole is bored by the bit or auger 10. It will be observed that the countersinking-disk j can be adjusted on the shank and held in such adjusted position by trictional contact with the sleeve 7, so as to enable the operator to countersink the recesses for nuts and washers l the necessary depth according to the thickl ness of the timbers. The threaded portion of the shank l is preferably somewhat smaller j in diameter than the remainder of 'the shank j to leave a shoulder ll, which limits the j travel ot the disk a thereon, and the interior of the lower end is reduced in space and may be either round or squared to receive the ordinary regulation bit or auger 10. From the foregoing it is believed the conl l struction, operation, and advantages of my invention will be apparent without further explanation. It is obvious that various minor changes may be made in size, proportion, and arrangement of parts, which changes come well Within the scope and j spirit of my invention as defined by the api pended claim. Hence I do not desire to be l limited to the precise construction and arll rangement shown.

Having thus described my said invention,

IOO

what l Claim as new7 and desire to secure by lieti 32's Patent of the United States, is-

The herein-described deviee Comprising a shank having an externally-serew-threaded lower end and its upper end shaped to lit a rotating element, a cutting-disk having a Central opening threaded to screw upen the threaded lower end of said shank, said disk being also fernied with an irregular-shaped slot having ene ef its walls bent downwardly and beveled to provide a Cutting edge, a sleeve having its upper portion internally screw threaded to screw upon the threaded lower end of said shank, the upper end 0f said sleeve being adapted to iinpinge against the bottom face of said cutting-disk to adl l l l l l l l l l i MATT LINGOL.

`Witnessesz FRANCIS M. FRANTZ,

HARRY C. RUSSELL. p 

